converging in ukraine s east now. with the aircraft and the equipment, that appears to show them preparingeq for a massive w offensive, commercial satellite photography shows an eight mile long russian military convoy in the east. the second largest city, the largest in the east, kharkiv. ukrainian military has thus far been david, fighting off a relentless and brutal goliath. but again, with new and as yet unconfirmed etreports, that rusa may have usedun a chemical weap in the city of mariupol, and with confirmed reports that russia appears to be preparing a whole new massive scale assault on the eastern part of the country, how much proverbial gas does the ukrainian side have left in the tank? how well resourced are they? how much more do they have to give? how much longer can they fight this hard and this well and this effectively?